Rice Straw Smoke Generation System for Controlled Human Inhalation Exposures

B M Jenkins; J J Mehlschau; R B Williams; Colin Solomon; J Balmes; M Kleinman; N Smith

doi:10.1080/02786820300977

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Rice Straw Smoke Generation System for Controlled Human Inhalation Exposures

Journal article

Open access

Peer reviewed

Rice Straw Smoke Generation System for Controlled Human Inhalation Exposures

B M Jenkins, J J Mehlschau, R B Williams, Colin Solomon, J Balmes, M Kleinman and N Smith

Aerosol Science and Technology, Vol.37(5), pp.437-454

2003

DOI: https://doi.org/10.1080/02786820300977

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Abstract

Chemical Sciences

Earth Sciences

Engineering

A unique burner system was designed for the purposes of exposing human subjects to rice straw smoke under highly controlled conditions. The system burns individual straws and has produced particle concentrations up to 900 ïg m-3 in a temperature and humidity controlled exposure chamber. Burner operation is fully automatic and programmable. Ignition is by radiant heating in a manner similar to the field. Particle concentration is controlled by the firing interval between straws and by the ratio of burner outlet flow mixing with the main purified air supplied to the exposure chamber. Steady-state particle concentrations are achieved within 5 minutes from start. Repeatability of particle concentration is excellent at the two exposure levels used, 200 and 500 ïg m-3. Measurements of particle size distributions suggest that approximately 80% of mass is in the size fraction below 1 ïm. Although particle concentrations are controlled at target levels with good precision, emission factors are higher than achieved with similar material in wind tunnel and field experiments. Further characterization of particulate matter is needed to determine if higher emission factors are associated with changes in particle composition and morphology that may influence exposure results.

Details

Title: Rice Straw Smoke Generation System for Controlled Human Inhalation Exposures
Authors: B M Jenkins (Author) - University of California, United States
J J Mehlschau (Author) - University of California, United States
R B Williams (Author) - University of California, United States
Colin Solomon (Author) - University of California, United States
J Balmes (Author) - University of California, United States
M Kleinman (Author) - University of California
N Smith (Author) - University of California, United States
Publication details: Aerosol Science and Technology, Vol.37(5), pp.437-454
Publisher: Taylor & Francis Inc.
Date published: 2003
DOI: 10.1080/02786820300977
ISSN: 0278-6826
Copyright note: Copyright © 2003 Taylor & Francis Group, LLC. The accepted manuscript of the paper is reproduced here in accordance with the copyright policy of the publisher. The definitive version is available from http://www.tandfonline.com/loi/gred20
Organisation Unit: Centre for Human Factors and Systems Science; University of the Sunshine Coast, Queensland; School of Health and Sport Sciences - Legacy; School of Health - Sports & Exercise Science; School of Health and Behavioural Sciences - Legacy
Language: English
Record Identifier: 99450505302621
Output Type: Journal article

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